Recent comments in /f/explainlikeimfive
[deleted] t1_iuia598 wrote
upcyclingtrash t1_iuia1g2 wrote
Reply to comment by JeffSergeant in ELI5 Why are airport ceiling so high? by TrShry
Seattle-Tacoma airport has that when you arrive and you're standing in line to go through passport control
Necessary_Fig_2265 t1_iui9nvf wrote
Reply to comment by thisisa_fake_account in ELI5 How did knights participate in tournaments like jousting without killing themselves? by QuantumHamster
Except Americans did not name the sport soccer.
[deleted] t1_iui9jhl wrote
DavidRFZ t1_iui9ec1 wrote
Reply to comment by itwasyousirnayme in ELI5: When a rectangular prism is rolled like a dice, why will it never land on it's end (small face) by -r-e-d-d-i-t-is-cool
Yeah, we had a game when I was little where oddly shaped objects were rolled. I think they were shaped like pigs.
The “less balanced” results were rare but they did happen once in a while. The rarity was worked into the game — you got more points for them.
Edit — I found the old game on Wikipedia.
mousicle t1_iui9bn1 wrote
Modern apartments don't have fireplaces and chimneys to safely have fires to warm your house. The people of Germany and Ukraine didn't spend all summer and fall cutting down trees and storing firewood for the winter. Medieval Europe's economy basically completely shut down in the winter.
amazingmikeyc t1_iui97vu wrote
Reply to comment by RD__III in ELI5 How did knights participate in tournaments like jousting without killing themselves? by QuantumHamster
yep.
Viktrorio t1_iui97sz wrote
Reply to ELI5 why is everybody saying that an 1.5°C increase in global temperature is catastrofic? by BloodyBite1
As I know we live now in time of the one of the most mass extinction of live creatures. Mainly insect are dying, which can cause that plants will die and then we all die. And there are many insects which very sensitive to temperature.
Source: https://www.sciencedirect.com/science/article/abs/pii/S0006320718313636
Career_Secure t1_iui91ar wrote
Reply to eli5 - If our cells only turn a certain amount of times before we die. Does causing micro damage from resistance training shorten our lifespan? by aus_ben93
Two important things for this question that are getting a little mixed up:
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You’re describing the ‘hayflick limit’, which states that a human cell dividing by mitosis (replicating itself) can only do so ~40-60 times before the telomeres are too short and the cell has natural processes built in to stop it from replicating and just hang out (senescence) or kill itself (apoptosis). While this phenomenon does play some role in and correlate with cellular-level aging, most general education and schools teach this as the main reason behind aging itself in general, which isn’t completely true. Most humans demonstrate ageing and die before their cells actually reach those hayflick limits - I believe studies calculate humans to be able to reach ~120 years before 40-60 mitotic cell replications are reached. Thus, lifespan (length) and healthspan (quality) of life are clearly influenced by many more factors that JUST the hayflick limit. There are genetic and environmental factors that can damage DNA, cause chronic inflammation, there’s the free-radical hypothesis, other reasons for cell senescence, ways to clear senescent cells (or not), etc.
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Differentiated cells like ‘muscle cells’ don’t only exist due to mitosis, which is what relates to the hayflick limit. Certain cells like resident stem cells or pluripotent cells don’t have limits to their replication. When damaged and weaker muscle cells are cleared out by activities like exercise, they are often replenished by their respective stem-like cell populations. Others mentioned mitochondrial biogenesis too. Exercise confers so many more benefits to quality of life and lifespan, that the small effects it may have on cells dividing by mitosis are far outweighed by the hayflick limit impacting your lifespan (again, see point 1). Studies show that people who regularly exercise or Olympic athletes in non-contact sports tend to actually live longer than those who don’t.
amazingmikeyc t1_iui8xry wrote
Reply to comment by thisisa_fake_account in ELI5 How did knights participate in tournaments like jousting without killing themselves? by QuantumHamster
nah the term soccer originates in the uk, it's an abbreviation of Association Football, hence my comment. Before soccer became the only "football" there are/were lots of games called it, notably Rugby Football
breckenridgeback t1_iui89cw wrote
Reply to comment by Pocok5 in ELI5: if Earth rotates so fast, why does it always look still from outer space? by ShesOver9k
> From low orbit the rotation is basically unnoticeable. The ground moves under you at 400-something m/s but you yourself are flying by at 7000+ so you're just trying to spot the ground move by under you slightly slower than expected.
Yes, all of which I already said in my own top-level comment. But that's not an issue of distance, really, it's an issue of Earth's mass - the same wouldn't be true of a proportional orbit around a tiny asteroid.
berael t1_iui7vgn wrote
Reply to ELI5 why is everybody saying that an 1.5°C increase in global temperature is catastrofic? by BloodyBite1
Global temperature - by definition - includes the entire globe.
The amount of energy it would take to increase the entire globe by 1.5°C is absolutely staggering.
Adding a mind-bogglingly large amount of energy to a system makes the system go crazy.
Mattbl t1_iui7tc6 wrote
Reply to comment by Shadowcat514 in ELI5 How did knights participate in tournaments like jousting without killing themselves? by QuantumHamster
So this is unrelated but in Game of Thrones: House of the Dragon, the first episode features >!a jousting tourney and they showed it descend into everybody killing each other!<. Now I realize that was for dramatic effect, but even in GRRMs books he always breaks down jousts the way you just did. Participants compete for notoriety and rewards, not to kill each other, and there are rules and blunted lances. It really bothered me how the show just >!continued the Hollywood trope of medieval jousting being some sort of death sport where anything goes and riders can just randomly try to murder their opponent in hand-to-hand combat if they don't like them!<.
Trumbleman t1_iui7kdh wrote
Reply to ELI5 why is everybody saying that an 1.5°C increase in global temperature is catastrofic? by BloodyBite1
Because it has a knock-on effect. A 1.5⁰C increase literally by itself might actually be nice in some places.
However, an increase in global temperatures can completely mess up the weather (hence the increase in forest fires, and hurricanes this year).
fat-lobyte t1_iui7hdn wrote
Reply to ELI5 why is everybody saying that an 1.5°C increase in global temperature is catastrofic? by BloodyBite1
For many reasons.
First of all, 1.5°C spread out over the entire atmosphere means that there is significantly more energy inside the atmosphere. This manifests as extreme weather such as storms, floods and hurricanes.
Second, this increase in temperature increases the amount of polar ice that melts, which increases the sea levels, which can lead to more flooding or the disappearance of entire regions or island nations.
Third, some ecosystems are very very sensitive to temperature changes, because they have evolved under a certain temperature for a long time.
PseudonymIncognito t1_iui7glk wrote
Reply to Eli5 What are the long term consequences of drugs that suppress REM sleep? by muted_Log_454
It killed Michael Jackson. Daily propofol injections led to him going completely without REM sleep for two months.
itwasyousirnayme t1_iui7dhh wrote
Reply to ELI5: When a rectangular prism is rolled like a dice, why will it never land on it's end (small face) by -r-e-d-d-i-t-is-cool
Well, it will sometimes do that, but it is very rare. It will take the path of least resistance. In this case that means it will usually land on a long side, since to land on a short side and stay there, it has to balance its footprint against its tendency to fall over. It’s the same as when you relax your body, you tend to fall into a reclined position where your body is more horizontal than vertical.
apple-masher t1_iui78x6 wrote
bacteria evolved the ability to do this first, and are so good at it, that there is little evolutionary advantage to be gained by any plant that managed to evolve the ability. the plants don't need to fix nitrogen. They already have mutualistic relationships with microbes that do it for them.
A_Garbage_Truck t1_iui78l2 wrote
Reply to comment by jamesgelliott in ELI5: What happens to health insurance companies and their employees if healthcare is made free? by thebatmansymbol
the biggest issue with trying to implement the system in the US is that by itself is not sufficient.
NHs's works in other countires because they also pass legislation that regulates food/consumer products in the interest of protecting public Health.
for instance: some of the products you see in the US sold as "Food" would be deemed outright illegal to sell in these nations just from the sheer amount of sugar in them.
such regulation would in turn significantly lower the incidience of avoidable diseases like morbid obesity, Heart diseases and diabetes. this would in turn "unclog" the NHS
TLDR:implementing a NHS demands legislation that also aims ot improve the overall Health of the population. some companies would rather not have that because it would cut inot their bottom line.
RamTheKnife t1_iui6pfl wrote
"Energy loss" does not exist. The law of conservation of energy states that energy cannot be created or destroyed only converted from one form to another. So when you burn the food, some of the chemical energy stored in the food item is converted into the byproducts of the burning, like smoke and heat etc.
urzu_seven t1_iui65dg wrote
Reply to comment by mfb- in ELI5 Why can’t plants absorb nitrogen from the air? by Cool-Boy57
I love the image of scissor wielding bacteria!
TheSillyman t1_iui64l8 wrote
Reply to ELI5: What happens to health insurance companies and their employees if healthcare is made free? by thebatmansymbol
A lot of those ‘administration jobs’ are relatively new, and when speaking about private insurance a lot of them mostly involve interfering with doctor patient relationships. One of the issues with our current health care system in the US is that there’s been an explosion in the number of administration staff, but not much growth in the amount of doctors. https://images.app.goo.gl/Fyi6Vjc7H2Zq8hgq6
In the US we also pay the most of any developed nation for healthcare while generally receiving worse outcomes. Insurance companies spend lots of the money you give them trying to deny you care. Personally, when I needed to start chemotherapy for late stage cancer my insurance company decided to delay it by repeatedly denying the pre authorization I needed. My oncologist spent more time on the phone with insurance staff (who had no formal medical training) trying to explain why I needed to start ASAP than they did with me as a patient.
While most of those administrators might lose their jobs if we switch to a public healthcare system, a public health system also opens up other employment opportunities and non insurance based administrative positions. I also think any job losses are greatly outweighed by the benefits to doctors and patients, who rather than having to spend time/money/energy/resources dealing with insurance companies could devote all of that to better patient outcomes.
r2k-in-the-vortex t1_iui62bv wrote
Because they simply do not have the required biological machinery. Animals and fungi also don't have it, luckily some bacterial cultures do so they basically do the nitrogen binding for the entire rest of the ecosystem(ignoring industrially produced fertilizers).
Similarly, all the vitamins, they are classified as vitamins because your body needs them, but can't produce them on it's own. You have to consume them from your food.
Reytorio t1_iui61hs wrote
Reply to comment by rasa2013 in ELI5: What happens to your body when a panic attack takes place? by Ronin77tolli
Couldnt for example olympia 100m sprinter somehow activate the fof response and beat Usain bolt's record?
artrald-7083 t1_iuia5m4 wrote
Reply to Eli5 what is the difference between polinominal and binominal data in data analysis by bascalie
I believe that what you are calling 'polynominal' might be more widely known as 'multinomial', that is, a nominal variable with lots of categories as seen in a multinomial logistic regression.
The distinction then makes sense: your standard logistic regression is modelling the probability of seeing the two values of a binary variable at different values of a continuous variable, while the multinomial logistic regression generalises this to a nominal variable with multiple values.
The reason a search engine would get confused (I ended up going via a dictionary) is that as you may or may not know polynomial without the N is a word for a sort of equation (and indeed, one that makes sense to see in a statistical context).
I could be wrong, but I do not think this term 'polynomiNal' is a common one, and in my own work as an industrial data scientist I tend to call your 'binominal' variables 'binary', and 'polynominal' simply 'nominal'.
There is always the possibility that I missed something.